These booklets are the same ones supplied with the kits, and are perfect if you'd like to have a back up of your paper elements, to practise cutting, or even mix and match between the sets (please note that not all wallpapers fit all sets).
Also available is the Additional Walls and Floors set, which has two sets of additional wallpapers, designed for all three sets, plus three new flooring styles. These have been designed to fit any of the sets available.